Oh dear. If it helps I felt like this before my sleeve op. you have done so well.
For me I too used to go to slimming world & definitely had my most successful weight loses there. Done weight watchers, Slimfast, lighter life, all of the except Atkins.
Always put it back on & then some. In discussions with my surgeon he told me my surgery was the only way for me. I am so glad I went for it. I am 4 months post op, love my sleeve & love my new found weight loss figure. There are ups & downs & you have to learn new ways but it is so worth it honest. Food wise I can only eat tiny portions & still introducing new foods. Mainly we find pasta rice bread difficult to tolerate but ome find it OK. You have to get in your protein first on a dily basis so meat, fish, poultry, beans & pulses etc. then you can eat small helpings of fruit & veg. Keep fts & carbs very low. Funny hrough I was a carboholic before now don't even want it. Yes still go out for meals, nibble small bits, went to Michel Roux's restaurant last week, Indian meal on Saturday, but tiny tasters. Still a foodie & cook & bake , just don't eat it! Love all my cookery progs on tv & foodie magazines. Loose skin well trying to exercise. Driving 2 weeks post op when dr & insurance gave me the ok.
Hope you work it out & make the right choice for you. Tons of support on here.